The righteous undercover male protagonist sneaked into the Demon Gate for only one day. After his identity was exposed because he mispronounced the formula, he was thrown into the sky prison. I thought I would definitely die, but I met one after another the senior sister, senior brother, and junior sister of the Demon Sect who were also undercover agents of the lost immortal sect. What's even more outrageous is that even the moody Demon Lord hugged his lap and cried. It turned out that the entire Demon Sect was full of undercover agents working with him.
